Influence of the interaction volume on the kinetic energy resolution of a velocity map imaging spectrometer  

作　　者：张鹏 冯正鹏 罗四强 王哲 

机构地区：[1]Huazhong University of Science and Technology, Wuhan 430074, China [2]Wuhan Institute of Technology, Wuhan 430073, China

出　　处：《Chinese Physics B》2016年第3期145-149,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11234004 and 61275126)

摘　　要：We investigate the influence of the interaction volume on the energy resolution of a velocity map imaging spectrometer. The simulation results show that the axial interaction size has a significant influence on the resolution. This influence is increased for a higher kinetic energy. We further show that the radial interaction size has a minor influence on the energy resolution for the electron or ion with medium energy, but it is crucial for the resolution of the electron or ion With low kinetic energy. By tracing the flight trajectories we show how the electron or ion energy resolution is influenced by the interaction size.We investigate the influence of the interaction volume on the energy resolution of a velocity map imaging spectrometer. The simulation results show that the axial interaction size has a significant influence on the resolution. This influence is increased for a higher kinetic energy. We further show that the radial interaction size has a minor influence on the energy resolution for the electron or ion with medium energy, but it is crucial for the resolution of the electron or ion With low kinetic energy. By tracing the flight trajectories we show how the electron or ion energy resolution is influenced by the interaction size.

关 键 词：velocity map imaging interaction size RESOLUTION 

分 类 号：O562[理学—原子与分子物理]